Tarek Osman is the author of Islamism: A History of Political Islam from the Fall of the Ottoman Empire to the Rise of ISIS and Egypt on the Brink. He wrote and presented several BBC documentary series including "The Making of the Modern Arab World" and "Islam Divided: Sunni-Shia". Tarek has spent two decades researching Middle Eastern politics and societies, and is a regular contributor on the Arab and Islamic worlds at leading newspapers worldwide.